Botary pump or engine



Dec. 16,1930. GRQESBECK 1,785,444

ROTARY PUMP OR ENGINE .Filed May. 26, 1925 6 Sheets-Sheet -1 Dec. 16, 1930. E. GROESBECK ROTARY IIUMP 0R ENGINE 6 Sheets-Sheet 2 Filed May 26, 1925" Dec. 16, 1930. E. GROESBECK 1,735,444

ROTARY PUMP 0R ENGINE Filed May 26, 1925 6 Sheets-Sheet 5 III I1 I19 Guam,

Dc.l6,1930. E. GROESBECK 1,785,444

ROTARY PUMP OR ENGINE Filed May 26, 1925 6 Sheets-Sheet 6 Ema e. 67066566" Patented Dec. 16, 1930 ERNIE GROESBECK, or osnKosi-r," WISCONSIN,

ROTARY PUMP. .OR ENGINE:

Application filed May 426,

This invention relates to rotary pumps or engines, and more particularly to an apparatus of this character comprising a casing, a rotor mounted therein, an abutment carried '5 by the rotor, and a movable gate adapted to cooperate with the abutment and form chamings, whereinl have shownone form of the invention adapted to operate as a pump,:the

bers within the casing.

An object of the invention is to provide an; apparatus of this character of comparalo tively few parts, possessing compactness,

simplicity and durability.

A further object is to provide improved means for actuating the gate whereby it is raised on each revolution of the rotor to permit the abutment to pass it. i i

A further object of the invention is to provide a construction of a rotary membe'r which may be employed either in pumps 01'. engines. V '7 In the accompanying drawings, I have shown several embodiments of the invention; In this showing: 7

Figure 1 is a front elevation, I

Figure 2 is a detail perspective view of the gate and a portion of the operating' means therefor,

Figure ,3 is an end elevation,

Figure 4 is a vertical sectional viewon line 4-4 of Figure 1, I Figure 5 is a similar view on line 5 f Figure 3,

Figure 6 is a similar view on line 66 of Figure 4,

Figure 7 is a front elevation form of the invention,

Figure 8 is an end elevation,

Figure 9 is a vertical sectional view on line 9-9 of Figure 7,

Figure 10 is a front elevation of a rotary steam engine constructed in accordance with the invention,

Figure 11 is an end elevation,

Figure 12 is a perspective view of the gate and aportion of the actuating means therefor, l

Figure 13 is a detail sectional view of a portion of the rotor and the gate showingthe of another exhaust passage through the gate,

Figure 14 is a vertical sectional view on line 14-14 of Figure--10, r

1925. Serial m). 33,029,

the governoractuated mechanism, and the governor valve, and, i

Figure 16 is a horizontalsectional view on line 1616-of Figure 14.

Referringto Figures .1 to '6 ofthe drawapparatus consists of asuitable casing-,1 which 1s circular in vertical crosssection, as

7 shown in 'Figure4 of the drawings, andwhich may be supported on a suitable base 2. As

shown, the casing is closed .byflend plates- 3, securedthereto by means of bolts-4. It is further provided with a central vertical par- 1 tition' 5, forn1ingtwo compartments. A main shaft '6 extends through the centerof the easing and is mountedin-su'itable bearings 7 carried-by--the end plates- The'se bearings may be provided-with suitable packing 8 rea. .tained in placebymeansof-packing glands 9. A rotor 10 is mounted in'each section'of the casing an'dieach of the rotors is-provid'ed with an; abutment l1', the outer face of which is adapted to contact with the interior wall 1 of the casi11g,as shown in Figure 4' of the drawings. The rotorsyare secured to the shaft torevolve therewith by means of keys 12' and, as shown in Figures 5 and 6 of the drawings, are arranged with the abutments opposite each other or 180 degrees apart.

The side faces of the-rotors are provided with packing rings -13" 'to preventmleakage and these rings are forced outwardly toward the-end walls and the "center partition by Figure 15 is a detail perspective view of means of suitable springs 14 disposed-atintervals throughout the "rotor, as shown in Figure 5 of the drawings.

One side of the casing is providedwith an 16 and adapted to be connectedto an intake 'pip'e17. The top of-thecasing is provided through the chamber 19'substantially parallel to the main shaft 6 andithe'movable gates are mounted 011 this ishaft andnare adapited eXtension 15 havirig a center port-0r passage 9 to normally extend into the interior of the casing through the openings 20. As shown, a sleeve 23 is keyed to the shaft by means i of a key 24, and this sleeve carries on arm 25 having a plate 26 on its outer endfwhich plate is of substantially the same width as the width of one of the sections of-the casing and serves as a gate to forma chamber within the casing between the gate and the abutment 11 The gate is provided with a packing strip 27 in its face normally forced outwardly by means of a spring 28 to engage the adjacent surface of the chamber 19 and prevent leakage of fluid from the inlet side of the casing into the chamber 19. V

- Suitable means are provided for raising the gate to theposition shown inFigure' 4 of the drawings, at each revolution of the rotor to permit the abutment 11.to pass. As shown, the mainshaft isfprovi'ded with'a cam 29, and this cam is adapted-to engage a roller 30 carried by a valve tappet rod 31. This rod passes through an opening in a bracket or arm 32, carried by the end plate (see Figure 5) and is prevented from turning by means ofa pin or'set screw 33, received in a groove 34 of the rod. As shown, the cam is secured to the shaft by means of a {key 35 andis provided with one high point toraise the rod once to each revolution of the shaft. A sleeve 36 is'keyed-to the shaft 22 by meansof a key 37 'andthis sleeve carries an arm '37 which serves as a crank and is provided with a lateral extension 38 .on its outer end. ;The crank portion 37 ,of this arm a V is adapted to be engaged by the reciprocating rod'31- to oscillate the shaft 22 and thusraise the'gate 26'. The ate is normally retained in lowered position bymeans of a spring 39 carried bya bolt 40 which passes through an opening 41 in the lateral extension 38. of the crank and is received in the arm or bracket 32. The upper-end of the spring engages a nut 42 arranged on the bolt 40 to permit the tension of the spring to be adjusted. 5

In the form of the invention shown in Fig- 'ures 7gto 9. of the drawings, the construction and operation is essentially the same. In this instance, the pump is provided with an inlet pipe 43 and an outlet pipe 44 communicating with a valve chamber '45 arranged on the top of the pump casing, The pivoted gate 26 is replaced by a sliding-gate 47, one of which is provided for eac'h'section of the pump casing. These gates are controlled by means of rods 48 slidably mounted in brackets 49 carried by the end plates .and provided with rollers-50 adaptedfto engageithe cams 29.

An armor bracket 51 is arranged above the bracket 49' and is adapted to support apivoted tappet rod 52 which is pivotally mounted in the end of the arm, as at '53. The upper end of the gate 47 carries a rod 54 which is adapted to receive a grooved collar 55 re- 7 tained in position by means of anut 56. The

adapted to be engaged by a valve 62 mounted on a stem 63 and the valve stem projects from the casing and is provided with a coil spring 64 retained in position by nuts 65 and adapted to normally retain the valve in closed position. This valve is adapted to be opened by suction and the gate is provided with a groove or passage 66 in its face through which the fluid flows to the pump casing. On the outlet side, there is provided a valve 67 mountedon a valve stem 68 and adapted to be opened by pressure. The valve stem is provided with a reduced portion having a coil spring 69 arranged thereon which is compressed when the valve is opened and normally retains the valve in closed position. The adjacent face of the gate is likewise provided-with a' groove or passage 70.

InFigures 10 to 15 of the draw1ngs,I have shown the invention applied to a steam engine. As the construction of the main'casing, the rotor and the abutments is substantially the same, as heretofore described, a further description thereof is deemed unnecessary. In this instance, I provide a cam 71 which is in reality a pair of cams and is provided with two high-points 7 2 and 7 2, one of which is adapted to operate the gate and the other adapted to operate the throttle valve. The cam 72 is adapted to reciprocate a rod 73 ,mounted in an opening in a bracket 74 on the sists of a cylindrical member 81 arranged in an intake chamber 82 and a separate throttle valve is arrangedon each side of the partition 5 to control the flow of steam to each section 1 of the casing.

As shown, the valve is provided with a reduced projecting portion 83 to which the arm 79 issecured so that the valve will be oscillated when the sleeve 76 is oscillated by the reciprocating rod 73. A suitable packing gland.84 is arranged around the projecting portion of the valve. V I a As shown in Figure 14; of the drawings, the inlet chamber is provided with a central passage85 connected to an inlet pipe 86 and the throttle valve is arranged at the inner end of this passage and provided with a port or passage 87 adapted to communicate with an opening 88 in the main casing.

sage 85 exteriorly of the throttle valve. As'

shown, the governor valve consists. of substantially cylindrical end portions 89 connected by arcuate or segmental portions 90 and provided with stub shafts 91 at each end. One of the cylindrical portions is provided with an eccentric opening'92 adapted to receive a pin 93 arran ed in an elongated slot governor is of the ball type, provided with the usual balls 96 connected to a movable plate 97, and a bevel gear 98 by means of arms 99. The governor is driven from the main shaft by means of a belt 100 passing over a pulley 101 on the main shaft and a pulley 102 on a shaft 103. The shaft 103 is provided with a bevel gear 104 meshing with the bevel gear 98.

The gate employed in the steam engine construction is operated in substantially the same manner as the sliding gate. 47 in the form -of the invention shown in Figures 7 to 9 of the drawings. As shown, the gate consists of a main body portion 105 mounted in a chamber 106 and this chamber is provided with an opening 107 to which the exhaust or discharge pipe is connected. The rear face of the gate is provided with a groove 108 through which the exhaust pipe is connected to the casing at all times. The opposite faceof the gate isprovided with a which is retained in engagement with the inner face of the chamber 106 by means of a spring 1.10. The upper end of the gate is provided with a rod 111 adapted to receive a grooved collar 112 retained in position by means of a nut 113. A rod 114 is mounted'in a second opening in the bracket 74 and is adapted to be reciprocated by the cam 72. This rod is adapted to actuate an arm 115 pivoted as at 116 to a bracket 117. The inner end of the arm is provided with a yoke 118 received in,the grooved collar 112. The arm is normally retained in lowered position by means of a coil spring 119 carried by arod or bolt 120 which passes through an opening 121 in the arm. Nuts 122 may be arranged on the bolt to permit adjustment of the spring.

In the operation of the form of the invention shown in Figures 1 to 6 of the drawings. the rotor revolves in the casing and upon each revolution, the gate 26 raises, as indicated in Figure 4 of the drawings, to permit the abutment or piston 11 to pass. As soon as the piston passes the gate, the roller 30 passes off the high portion of the cam 29 and the spring 39 returns the shaft 22 to its original position, permitting the gate, to be lowered through the opening'20 into the cars ing. As shown in Figures-5 and 6 of the drawings, the gates are independently operated by means of separate cams arrangedon opposite ends of the shaft and disposed at 180 degrees from each other. When the gate opening 21. 94 on the lower end of a governor rod 95. The 4 Figures 7 to 9. of the drawings,

through its cam 39 to created in back of the Similarly,

packing strip 109 parts are in the usual manner to cut down the is lowered andathe rotor continuesto revolve,

a partial vacuum is created in the casingin the space between the gate "and the abutment 11. Fluid. then flows? through'the'inletpipe the fluid that has entered. on the .past revolution and is in front .ofthe abutment; is "forced outflthrough the chamber, 19. to theoutlet In the form of the invention shown ain the opera-- tion is essentiallythe-same, the gate in each section of the pump casing being raised permit the piston or Thepartial vacuum piston or abutment and in;:the inlet chamberunseats the valve 62=against the tension. of the spring 64-and abutment 11 to pass.

permits fluid to enter from the inlet .pipe.

the .fluid. forced into the outlet 21 chamber through the 1 port" or passage" in thegate unseats the valve 67 bypressure to permitthefluid'tofescape through the discharge pipe 44. The raising of the gate on each revolution of the rotor is accomplished r through the reciprocating rod 48' which raises the arm ,52 and this arm is returned to normal position by means of a spring (not shown) similar to the spring 39. I i,

In the operation of the device as a steam engine, the gate 105 functions in the manner just described and is caused to raise at the proper time by the cam 72, rod 114, and

pivoted arm 115. The arm is'returned to normal position to lower the gate by means of the spring 119. The throttle valve oscillates through a portion of a circle to supply a quantity of steam to the casing when the position shown in Figure 14 of the drawings just after the abutment has passed the inlet opening, 88. This is accomplished by oscillating the crank or arm 79 on the end of the throttle valve through the provision of the arms and 78, the loosely mounted sleeve 7 6, the rod 73 and the cam 72. The governor valve operates in the size of the passage by oscillating the valve until the segmental portion closes or partially closes thepassage 85.

It isto be understood that the forms of my invention herewith shown and described are to be taken as preferred examples of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

I claim: V

A device of the character described comprising a cylindrical casing, a partition arranged in said casing to divide it into two cylindrical sections, a solid cylindrical rotor mounted in each section of said casing, and having its periphery spaced from the walls '17 intothe casing behind theabutment'and of the 1 casing, a main shaft extending through said I casing and carrying said rotors, rigid radial abutments carried by and integral with said rotors at substantially 180? from each other, anoutlet chamber communicating .With-Feach section of said casing, gates mounted in said outlet chambers each gate being arranged to project into different sections of said casing to tengage the periphery of said rotors, said casing being provided With an inlet opening fen:

wardly of said gates-whereby fluid enters between the casing and the rotors on one side ofsaid gates and flows into said outlet chamber on the opposite side of said gates, said.

gates being provided with pivoted arms, an auxiliary shaft arranged to operate said arms, cranks secured to said last named shaft, tappet means for actuating said cranks, and cams carried by the main shaft for actuating said tappet means.

In testimony WhereoflI aflix my signature.

v 1 ERNIE (urROESBECK. 

